Labling

I have a project where i'm taking Cad Files and putting them into a feature class in Arcmap. Have created a field in the attributes table, so that we can name each polyline. (This polylines are roads in are Subdivisions.) I have a half dozen polylines out of 400 or so that the labels will not show up on my map.

My Question is can someone tell me why? I have tried several work a rounds and still does not make any difference.